On board the boom defence vessel Barbain (1940) working off Sembawang, Singapore. The photographer is looking forward from the starboard side of the foredeck showing some of the crew on the horns working on the chains of a mooring buoy. A dan buoy is in the shrouds of the mast in the foreground. A Royal Air force motor work boat is close ahead of the Barbain (1940) attaching on a line to a small drum buoy. Negatives numbers P99801 to P99847 inclusive were taken on the same occasion.